Certain metals are attracted to a magnet.
某些金属受磁石的吸引。
Certain metals are attracted to a magnet.
某些金属受磁石的吸引。
She can magnetise a theatre audience.
她能像磁石般吸引剧院观众。
Evolving process of hub dynamo which used in bicycle is presented. The performance of magnetite viz. ferrimagnetism or NdFeB is analyzed. The prospect of marketing is viewed.
绍
自行车上使用的花鼓式发电机的演变过程，分析所用磁石，即铁氧体或钕铁硼的性能优劣，并进行市
展望。
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